The International Institute of Social History (IISH) is the world’s largest documentation and research center in the field of social history. IISH started to use Evergreen in 2011 after a great deal of preparation for the migration from the old commercial library system to Evergreen. During migration a lot of great improvements in the quality of MARC records were done so at the moment IISH the Library team has a lot of experience with using Evergreen. The mission of IISG has been changed from January, 2013, so Evergreen library system will be used for the development of tools for data mining, the linking of texts and visual materials, building timelines and visualizing tools for collections and biographies. Data stored in the IISH will be used as training sets for development of tools for Named Entity Recognition (NER), language identification, text analysis, topic detection and other Natural Language Processing tools. This presentation will be an introduction of the development of tools and will show examples of Digital Humanities tools based on Evergreen open-source library system.